Stent delivery systems and associated methods
First Claim
1. A stent delivery system for deploying a stent within a vessel, comprising:
- a delivery catheter comprising a tubular enclosure at a distal end portion of the catheter;
a braided stent constrained within the tubular enclosure, wherein the stent is configured to transition between an elongated radially compressed state and a shortened radially expanded state;
a handle assembly comprising;
a first lead screw and a second lead screw of opposite handedness and positioned along a longitudinal axis, wherein the first lead screw is in mechanical communication with the tubular enclosure and the second lead screw is configured to be placed in mechanical communication with the stent;
a housing coupled to the delivery catheter and having a bore wall surrounding at least a portion of each of the first and second lead screws, wherein the bore wall has a first housing thread and a second housing thread thereon, the first and second housing threads intersecting on the bore wall,wherein upon rotation of at least a portion of the housing about the longitudinal axis, the first housing thread engages the first lead screw and the second housing thread engages the second lead screw so as to induce at least substantially simultaneous translations of the first and second lead screws in opposite directions along the longitudinal axis, wherein the translations are configured to deploy the stent from the tubular enclosure.
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Accused Products
Abstract
Stent delivery systems and associated methods for delivering stents are disclosed herein. In several embodiments, a handle assembly for delivering a stent from a tubular enclosure can include a first lead screw having a first lead thread of a first pitch and first handedness, a second lead screw having a second lead thread of a second pitch and second handedness different from the first handedness, and a housing defining threads of the first and second pitches. The first lead screw can be in mechanical communication with the tubular enclosure, and the second lead screw can be in mechanical communication with the stent. Upon rotation of a portion of the housing, the housing threads can engage the lead screws so as to induce simultaneous translations of the lead screws in opposite directions. The simultaneous translations are configured to deploy the stent from the tubular enclosure.
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Citations
51 Claims
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1. A stent delivery system for deploying a stent within a vessel, comprising:
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a delivery catheter comprising a tubular enclosure at a distal end portion of the catheter; a braided stent constrained within the tubular enclosure, wherein the stent is configured to transition between an elongated radially compressed state and a shortened radially expanded state; a handle assembly comprising; a first lead screw and a second lead screw of opposite handedness and positioned along a longitudinal axis, wherein the first lead screw is in mechanical communication with the tubular enclosure and the second lead screw is configured to be placed in mechanical communication with the stent; a housing coupled to the delivery catheter and having a bore wall surrounding at least a portion of each of the first and second lead screws, wherein the bore wall has a first housing thread and a second housing thread thereon, the first and second housing threads intersecting on the bore wall, wherein upon rotation of at least a portion of the housing about the longitudinal axis, the first housing thread engages the first lead screw and the second housing thread engages the second lead screw so as to induce at least substantially simultaneous translations of the first and second lead screws in opposite directions along the longitudinal axis, wherein the translations are configured to deploy the stent from the tubular enclosure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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- 16. The stent delivery system of 15 wherein the second lead screw has a coupler engagement surface, wherein the stent delivery system further comprises a coupler in mechanical communication with the stent, and wherein the coupler has an abutment surface configured to interface with the coupler engagement surface of the second lead screw.
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35. A handle assembly for delivering a stent from a tubular enclosure, the handle assembly comprising:
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a first lead screw having a first lead thread of a first pitch and a first handedness, the first lead screw having a first screw cross-section situated radially inwardly from the first lead thread, wherein the first lead screw is in mechanical communication with the tubular enclosure; a second lead screw having a second lead thread of a second pitch and a second handedness different from the first handedness, and a second screw cross-section situated radially inwardly from the second lead thread, wherein the second lead screw is configured to be placed in mechanical communication with the stent; wherein the entireties of the first and second lead screw cross-sections each fit on or within a respective sector of a circle, the circle being coincident with a cross-section of the handle assembly; a housing surrounding at least a portion of each of the first and second lead screws, the housing defining a first housing thread of the first pitch and the first handedness and a second housing thread of the second pitch and the second handedness, wherein, upon rotation of at least a portion of the housing about a longitudinal axis, the first housing thread engages the first lead thread and the second housing thread engages the second lead thread so as to induce simultaneous translations of the first and second lead screws in opposite directions along the longitudinal axis, wherein the translations are configured to deploy the stent from the tubular enclosure. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. A handle assembly for delivering a stent from a tubular enclosure, the handle assembly including:
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a first lead screw having a first lead thread with a first handedness, wherein the first lead screw is in mechanical communication with the tubular enclosure; a second lead screw situated adjacent the first lead screw along a longitudinal axis, wherein the second lead screw has a second lead thread with a second handedness different from the first handedness, the second lead screw being configured to be placed in mechanical communication with the stent; a housing surrounding at least a portion of each of the first and second lead screws, the housing having an internal first housing thread of the first handedness and an internal second housing thread of the second handedness, wherein the first and second lead screws have adjacently situated lengths within the housing, the first and second lead screws together defining an approximately circular cross-section at their adjacently situated lengths, with each lead screw defining a portion of the outer circumference of the circular cross-section; wherein, upon rotation of at least a portion of the housing about the longitudinal axis, the first housing thread engages the first lead thread and the second housing thread engages the second lead thread so as to induce simultaneous translations of the first and second lead screws in opposite directions along the longitudinal axis. - View Dependent Claims (49, 50, 51)
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Specification